500
Characteristic of each layer of the atmosphere
What is.....
Troposphere (has most of atmosphere's mass, 1st later next to Earth, weather occurs here)
Stratosphere (contains ozone layer, temp increases as you increase in altitude)
Mesosphere (burns up meteorites, very cold)
Ionosphere (has particles that absorb sun's energy to create Northern Lights)
Exosphere (particles so far apart they rarely strike each other, outermost layer of atmosphere)